Malicious PDF — malware analysis report

Static analysis result for SHA-256 30c2e0aeae67595a…

MALICIOUS

PDF

74.8 KB Created: 2021-09-05 04:33:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 49bffc88a20c1056236fb9eafefb867d SHA-1: 54bec7d737bfdc8f3c4131e6d08f9c523da864a9 SHA-256: 30c2e0aeae67595a858fbd2e189722431b239f3e40fd32426d642a0faa74a81f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF was flagged by ML and ClamAV as malicious, with heuristics indicating it functions as a link farm pointing to compromised CMS uploads and disposable hosting. The embedded URLs suggest a phishing or malware distribution scheme, likely initiated via spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://meteosputnik.ru/userfiles/file/babunariwujolexozebitelo.pdf In PDF document text
    • http://agiusfuneraldirectors.com/files/file/gavodulidoje.pdfIn PDF document text
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/a4743edcc2eb22e03b1ae24486de4e31/69942594165.pdfIn PDF document text
    • http://studiobaliva.eu/userfiles/files/61055521251.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a203508a0c2---mitubemanugijaxevufo.pdfIn PDF document text
    • https://erdemlerkoleji.com/resimler/files/nazakub.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16083713d09463---debirelufan.pdfIn PDF document text
    • https://shaplaconsulting.com/app/webroot/ckfinder/userfiles/files/duwasusov.pdfIn PDF document text
    • http://a2itsolutions.com/chop/multimedia/userfiles/file/lazujovopozigajidivaximex.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a62b35474b8---6923921204.pdfIn PDF document text
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1612b2885d4192---xetisovilifan.pdfIn PDF document text
    • http://uhy-th.com/image/upload/files/50142808740.pdfIn PDF document text
    • https://eitmedu.in/ckfinder/userfiles/files/66483192792.pdfIn PDF document text
    • http://avondale61.com/clients/e/e2/e25739fb73bf6f2fbed92e75d980d6c5/File/12884550142.pdfIn PDF document text
    • http://thestarbusan.net/FileData/ckfinder/files/20210617_1AF47D9ACACB26EF.pdfIn PDF document text
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/31f3892d515519271377a3fa936e93da/jitumezi.pdfIn PDF document text
    • http://childconnect.com/swi/fckfiles//file/19219463327.pdfIn PDF document text
    • http://ferramentabelleggia.it/public/file/58399985589.pdfIn PDF document text
    • http://activesolutionelectric.com/images/file/61030183664.pdfIn PDF document text
    • http://hoangle.vn/uploads/userfiles/file/26239283353.pdfIn PDF document text
    • https://nbretail.com.vn/ckfinder/userfiles/files/94435089609.pdfIn PDF document text
    • https://cairparavel.ro/app/webroot/files/userfiles/files/gawulinezo.pdfIn PDF document text
    • https://yukkumpulgroup2.com/contents//files/relijakesadodasijus.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=adverbial+phrases+worksheet+for+grade+7PDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c0e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0E7 11088 bytes
SHA-256: 719163acedf7788b9537eb4d5f2c7216fdc85c18ad078fe689441a0fe89e0750
font_01_sfnt_off0000da9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA9A 16744 bytes
SHA-256: 662bd3be85a2abc912528283b35015eaa5f044ccfc7fc8783d2b68857a6211df
font_02_sfnt_off000105c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105C2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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